US 6,606,158 B2 · Determination of a property of an optical device

Abstract

A method and an apparatus for determination of properties, e.g. of elements of the Jones matrix of an optical device under test, comprising the steps of: producing an incoming light beam, splitting the light beam into a first light beam and a second light beam, coupling the first light beam, preferably having two parts delayed with respect to each other, with a given initial polarization into the optical device under test, letting the second light beam travel a different path than the first light beam, superimposing the first light beam and the second light beam to produce interference between the first light beam and the second light beam in a resulting superimposed light beam, splitting the superimposed light beam into a third light beam polarization dependent and a fourth light beam, detecting the power of the third and the fourth light beam as a function of frequency when tuning the frequency of the incoming light beam over a given frequency range, deriving optical properties, e.g. elements of the Jones matrix, from the frequency dependency of the detected power.

Claims30

Dependent claims

A method of determination of a property of an optical device under test, comprising:

splitting an incoming light beam into a first light beam and a second light beam,
coupling the first light beam with defined polarization into the optical device under test,
letting the second light beam travel a different path from the first light beam,
superimposing the first and the second light beam to produce interference between the first light beam and the second light beam in a resulting superimposed light beam,
detecting the power of the superimposed light beam as a function of frequency and polarization when tuning the frequency of the incoming light beam, over a given frequency range, and
deriving the optical property of the optical device under test from the frequency dependence of the detected powers.

3 more elements

An apparatus for determination of optical properties of an optical device under test, comprising:

a first beam splitter in a path of an incoming light beam for splitting the incoming light beam into a first light beam traveling a first path and a second light beam traveling a second path, wherein
the optical device under test can be coupled in said first path for coupling in the first light beam with a defined polarization,
a second beam splitter in said first and in said second path for superimposing the first and the second light beam after the second light beam has traveled a different path as the first light beam, to produce interference between the first light beam and the second light beam in a resulting superimposed light beam traveling a resulting path,
a detector unit in said resulting path for detecting the power of the resulting superimposed light beam traveling the resulting path as a function of frequency and polarization when tuning the frequency of the incoming light beam over a given frequency range, and
an evaluation unit for deriving optical properties of the optical device under test from the frequency dependency of the detected powers.

2 more elements

Dependencies are inferred from the claim text.

Determination of a property of an optical device

Life of this patent

Determination of a property of an optical device

Life of this patent

Abstract

Claims30